BUG=angleproject:883

Change-Id: I1d748281184ff8111f8ff1c63f56882650b6871b
Reviewed-on: https://chromium-review.googlesource.com/266034Reviewed-by: Brandon Jones <bajones@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Tested-by: Geoff Lang <geofflang@chromium.org>